Property and equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property and equipment
Total property and equipment	$ 337,888	$ 198,764
Less: accumulated depreciation and amortization	(123,388)	(86,992)
Total property and equipment, net	214,500	111,772
Depreciation and amortization
Depreciation and amortization	38,293	27,446	$ 18,940
Abandoned build-out projects
Asset impairment charge
Impairment losses	215
Certain software developed for internal use, change in the use
Asset impairment charge
Impairment losses		406
Abandoned Wi Fi network assets resulting from venue termination agreement
Asset impairment charge
Impairment losses		494
Network access
Depreciation and amortization
Depreciation and amortization	22,666	18,074	12,651
Network operations
Depreciation and amortization
Depreciation and amortization	9,058	5,662	4,091
Development and Technology
Depreciation and amortization
Depreciation and amortization	5,441	3,381	1,992
General and administrative
Depreciation and amortization
Depreciation and amortization	1,128	329	$ 206
Leasehold improvements
Property and equipment
Total property and equipment	243,743	152,627
Construction in progress
Property and equipment
Total property and equipment	57,692	20,104
Software
Property and equipment
Total property and equipment	24,349	17,827
Computer equipment
Property and equipment
Total property and equipment	10,366	7,909
Furniture, fixtures and office equipment
Property and equipment
Total property and equipment	1,738	297
Equipment acquired under capital leases
Property and equipment
Total property and equipment	5,080	1,209
Less: accumulated depreciation and amortization	$ (932)	$ (300)